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MIMO CDMA antenna system for SINR enhancement

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3 Author(s)
Choi, R.L.-U. ; Center for Wireless Inf. Technol., Hong Kong Univ. of Sci. & Technol., China ; Murch, R.D. ; Letaief, K.B.

We present a system to enhance signal-to-interference plus noise ratio (SINR) for multiple-input-multiple-output (MIMO) direct-sequence code-division multiple-access (DS/CDMA) communications in the downlink for frequency-selective fading environments. The proposed system utilizes a transmit antenna array at the base station and a receive antenna array at the mobile station with finite-impulse response filters at both the transmitter and receiver. We arrive at our system by attempting to find the optimal solution to a general MIMO antenna system. A single user joint optimum scenario and a multiuser SINR enhancement scenario are derived. In addition, a simplified one-finger receiver structure is introduced. Numerical results reveal that significant system performance and capacity improvement over conventional approaches are possible. We also investigate the sensitivity of the proposed system to channel estimation errors.

Published in:

Wireless Communications, IEEE Transactions on  (Volume:2 ,  Issue: 2 )

Date of Publication:

Mar 2003

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